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प्रश्न
If z = x + iy, find the following in rectangular form:
`"Im"(3z + 4bar(z) - 4"i")`
उत्तर
= Im (3(x + iy) + 4(x – iy) – 4i)
= Im (3x + 3iy + 4x – 4iy – 4i)
= Im (3x + 4 + i(3y – 4y – 4)
= Im (3x + 4x + i(– y – 4))
= Im [7x + i(– y – 4)]
= – y – 4
= – (y + 4)
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